Components of Provision for Income Taxes (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jul. 31, 2012	Jul. 31, 2011		Jul. 31, 2010		Jul. 31, 2009
Income Taxes [Line Items]
Income tax benefit recognized in the consolidated statement of operations	$ (741,245)
Total tax provision	3,035	819	[1]	5,162	[1]	10,831	[1]
Current Provision [Member]
Income Taxes [Line Items]
Federal				(367)	[1]
State				185	[1]
Foreign	2,632	599	[1]	5,737	[1]	11,942	[1]
Current Income Tax Expense (Benefit), Total	2,632	599	[1]	5,555	[1]	11,942	[1]
Deferred Provision [Member]
Income Taxes [Line Items]
Federal			[1]		[1]		[1]
State			[1]		[1]		[1]
Foreign	403	220	[1]	(393)	[1]	(1,111)	[1]
Income tax benefit recognized in the consolidated statement of operations	$ 403	$ 220	[1]	$ (393)	[1]	$ (1,111)	[1]

[1] As Restated